Marsupialia Ordo (Class Mamalia)



understanding of marsupials
Kingdom Animalia has several levels to divide the animals that are on earth. The highest level in the kingdom Animalia are mammals. In general, all mammals have hair covering its body. The amount of hair varies from one species to another. There is a species whose entire body is covered by hair and some species only have hair in certain places on the body. Mammals are animals that are homoioterm or often called warm-blooded animals. This is due to its ability to adapt to the surrounding environment.Kingdom Animalia has several levels to divide the animals that are on earth. The highest level in the kingdom Animalia are mammals. In general, all mammals have hair covering its body. The amount of hair varies from one species to another. There is a species whose entire body is covered by hair and some species only have hair in certain places on the body. Mammals are animals that are homoioterm or often called warm-blooded animals. This is due to its ability to adapt to the surrounding environment.

Marsupials is the only order Metatheria and therefore also called Didelphia, an existing name with a double uterus. In all marsupials urinary tract (ureters) that runs from the kidney into the urine bag, divide the sexual organs are developing so on both the content and the adult female vagina (channeling removal of spermatozoa will fertilize), a dual structure. In the male marsupial, the second dealer who will deliver sperm from the testes to the tool spermatozoa copulation (penis), located outside the urinary tract, while the true mammals (Theria) located between the urinary ducts. The characteristics of the organ to breed is the only sure way to distinguish between true marsupials and mammals. Prior to this distinction in mind some of the marsupials that are still alive today classed true mammals. Sac which has given the name to the marsupial, is actually not an essential characteristic, even not a common feature of this group. This bag is absolutely no example in primitive marsupials. Some fossils are now considered mammals dinaggap a class infra in question, but may also be due to fossil marsupials stored and intact organs to grow well might not be found to have to use other anatomical features.

Examples of animals of the order of marsupials 
kangaroo (Macropus rufus). Or kangaroo kangaroos are mammals that have a pouch (marsupials). These animals include the typical Australian animals. The word kangaroo taken from Aboriginal languages ​​gangguru. Kangaroos have a habit of sleeping during the day with hot air and reproduce when there is rain and grow new crops. 

Not all kangaroos have pouches, only The female kangaroo has a pouch that. Genetic distinctiveness is what makes Kangaroos memeiliki physical differences with other animals, which will kemiliki female kangaroo pouch on his stomach, and is used to carry her child. Kangaroo child will always have the instinct untyuk refuge in pockets of its parent, especially in the past he was a child, In addition kangaroo young children also drank milk that can be obtained from the bag.

Morphological structure Kangaroo (Macropus rufus) 
Kangaroo has a small head, hairy, and snout. They are biased ears moving from front to back is very helpful to follow suara.kemampuan them from harm, especially predators. 

Kangaroo hind leg size, larger than the front legs. This foot is used to jump and save yourself from the enemy. The foot depanya used to pull leaves or digging the ground while searching for water. Kangaroo tail strong and muscular. The tail serves as the support kangaroo balance while standing.

Structure Anatomy Kangaroo (Macropus giganteus)
In the anatomy of mammals generally are the heart (cor), divided into four perfect room (two auricula, two ventricula), only archus aorticus sinistrum still there, erythrocytnya not nucleated, usually rounded. Breathing only with pulmonary (lung), the larynx has a voice rope, has the perfect diaphragmaticus musculus separates pulmonary and cast with abdominalis.Memiliki bladder cavity, a fluid excretion results urine.Memliki 12 nervikranialis, well developed brain. Both cerembrum and large cerebellum. Body temperature (homoiotherm). In Hewang copulation males have tools such as penis, testicles in the scrotum are generally located outside the abdomen .

Fertilization occurs inside, the eggs are usually small without graft and stay in the uterus for further growth has mebrana embrionyca (amniom and corium), usually have a placenta that connects the embryo to the uterine dingding used for nutrition and respiration children in foster care after birth and in breast-fed.

Motion Systems In Kangaroo (Macropus giganteus) 
The kangaroo is a unique animal, he moves by jumping, kangaroo able to jump with a speed of 20-25 km/h (slow category), 40-45 km/h (general), 70 km/h (fast). Kangaroos can jump like that because it is supported by the structure of the feet, especially the soles of his feet are formed by a thick muscle that can also bounced, besides moving kangaroo can also run with langkahan alternating legs that are not flat on the ground, so it seems like a jump, if it is running like it, kangaroos need the help of the tail to wag to the left and to the right. Kangaroos can not walk backwards because of the structure of his body bent forward and muscular tail structure.

System excretion 
Kidney-shaped beans, kidney median space called the renal pelvis associated with bladder through the ureters. From the bladder to the urethra issued mngeluarkan urine through the urinary tract. dominant kangaroo own separate channel, unlike other vertebrate animals that use the cloaca. Kangaroos and other mammals have the rest of the digestive tract via the anus discharge, urine through the urethra and reproductive tract through the vagina and penis 

Respiratory System 
Grooves containing nasal turbinal bones winding the olfactory surface expands. A roofed larynx epiglottis containing the vocal cords. Two lungs each in a separate pleural space. The active phase of the breathing is inspiration followed by depression (flattening) of the elevation of the diaphragm and intercostal (with motion curving out).

Circulation system
Four chambered heart in the kangaroo is the same as other mammals have two atria and two ventricles separated perfectly. There is a double circulation (systemic and pulmonary circuits). Delivery of oxygen throughout the body will increase because there is no mixing of oxygen -rich blood with oxygen-poor , so it is more perfect than the class of reptiles. Sebgai mammalian animals, kangaroos require more oxygen per gram of body weight compared to vertebratalain with the same body size.

Reproductive System
a. male
Consists of the testes, epididymis, vas deferens, and penis. The vas deferens passes posterior to the lateral part and then join the urethra. Male kangaroos do not have seminal vesicles, resulting in spermatogenesisnya cycle, resulting csperma not stored in advance in the sperm sac but directly channeled. Kangaroos have epididimisnya channel width and has testes which are also wide. At the end of the kangaroo penis, found a branching where two branches are both functioning for them to copulate. In one berkopulasi, kangaroo males produce millions of sperm that will fertilize the female egg.
b . female
During pregnancy in female kangaroos ranged from 18-38 days depending on the species, to species of red kangaroos (Macropus rufus ) experienced a period of approximately 33 days gestation. Berkopulasi female kangaroo pocket change when the baby nipples, female kangaroos produce one egg is fertilized by a sperm cell, the fertilized egg does not always evolved directly, the egg cell requires a minimum temperature, therefore, the egg in the uterus kangaroos will be able to thrive when the rainy season. But if the kangaroo berkopulasi during the rainy season then the fertilized egg will be directly grown for 33 days.

Kangaroo reproductive system is very different from other animals. Kangaroo embryo passes through several stages of development outside the uterus, which usually occurs in the womb.

conclusion
  • In general, all mammals have hair covering its body. The amount of hair varies from one species to another.
  • Mammals are animals that are homoioterm or often called warm-blooded animals. This is due to its ability to adapt to the surrounding environment.
  • The term itself comes from the existence of mammalian glands (glands) in the mammary their body that serves as a supplier of milk. As we know that female mammals breastfeed her child by utilizing the existence of the gland.
  • Examples of animals of the order of marsupials are kangaroos (Macropus rufus)
  • Morphological structure kangaroo kangaroo hind leg size, larger than the front legs. This foot is used to jump and save yourself from the enemy. The foot depanya used to pull leaves or digging the ground while searching for water. Kangaroo tail strong and muscular. The tail serves as the support kangaroo balance while standing.
  • Four chambered heart circulation system on a kangaroo is the same as other mammals have two atria and two ventricles separated perfectly

Posted by Wasiwa
Wasiwa Updated at: May 04, 2014

2 komentar:

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